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31. The earliest known dam is______________

Jawa Dam Sadd – el – Kafara Dam Great Dam of Marib Roman Dam

Jawa Dam

Jawa Dam is earliest known dam. Jawa dam which is in Jordan, 100 km away from capital Amman. This earliest built dam Jawa is a gravity dam. This dam structure is dated to 3000 BC. This Jawa dam is still in use.

Hint Answer

32. The era of large dams was initiated with construction of which dam?

Hoover Dam Tarbela Dam Tehri Dam Aswan Low Dam

Aswan Low Dam

The era of large dams was initiated with construction of Aswan Low dam. This Aswan Low dam is located in Egypt in Africa continent. This dam is built in 1902. Its is gravity masonry buttress dam on Nile river.

Hint Answer

33. Arch dams are first built by __________

Greeks Romans Portuguese British

Romans

The Romans were first to build arch dams. In this arch dams reaction force stabilizes structure from external hydrostatic pressure. Later in 19th century British Empire builds many arch dams.

Hint Answer

34. The tallest dam in world is______________

Jinping- l – Dam Nurek Dam Xiaowan Dam Xiluodu Dam

Jinping- l – Dam

Jinping- l ? dam is tallest dam in world. It?s is of 305m in height. It is a concrete arch type dam. It is situated in China and river that flows in this dam is Yalong. Nurek Dam, Xiaowan Dam and Xiluodu Dam are second, third, fourth tallest dams respectively.

Hint Answer

35. Which of following types of dams were widely used in early part of industrial revolution?

Steel dams Timber dams Coffer dams Check dams

Timber dams

Timber dams were widely used in early part of industrial revolution. This is due to ease and speed of construction. Two common variations of timber dams are a crib and plank. Both se variations have different functions.

Hint Answer

36. Which of following is a natural dam?

Tailings dam Diversionary dam Saddle dam Volcanic dam

Volcanic dam

Volcanic dams is example for natural dam. It is formed when lava flows, often basaltic, intercept path of a stream or lake outlet, resulting in creation of a natural impoundment. Uinkarat volcanic field in United States is example for volcanic dam.

Hint Answer

37. A dry dam is designed to control flooding.

True False

True

A dry dam is also known as a flood retarding structure. This dry dam is designed in such a way to control flooding. This dry dams normally holds back no water and allows channel to flow freely except during intense flow period.

Hint Answer

38. The glacier blocks a river in dam is known as________________

Ice dam Blockage dam Spilt dam Isolated dam

Ice dam

An Ice dam occurs when water builds behind a blockage of ice. Ice dams form eir when ice chunks in a river and forms a lake or when ice chunks in a river are blocked by something and build up to form a dam.

Hint Answer

39. The name given to diversion channels of western Himalayas is__________________

Phalodi Johads Guls or Kuls Khadins

Guls or Kuls

The diversions channels of western Himalaya is known as Guls or Kuls. In hills and mountains, people built diversion channels for irrigational purposes, which are called Guls and Kuls. It is mainly used in western Himalayas for harvesting water.

Hint Answer

40. Mattur dam is located across Krishna river.

True False

False

Mettur dam which is largest dam in Tamil Nadu located across Cauvery river. This Mettur dam provides irrigation and drinking water facilities for more than 10 districts of Tamil Nadu. Hence it plays a vital role in farmers life.

Hint Answer

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All Chapters

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Natural Resources

Natural Resources

Ecosystems

International Conventions and Protocols

International Conventions and Protocols

Environmental Pollution

Environmental Pollution

Forest and Wildlife Management

Forest and Wildlife Management

Social Issues and the Environment

Social Issues and the Environment

Background to International Efforts for Environmental Protection

Background to International Efforts for Environmental Protection

Human Population and the Environment

Human Population and the Environment

Biodiversity

Topics

This Chapter consists of the following topics

Natural Resources

The earliest known dam is______________

The era of large dams was initiated with construction of which dam?

Arch dams are first built by __________

The tallest dam in world is______________

Which of following types of dams were widely used in early part of industrial revolution?

Which of following is a natural dam?

A dry dam is designed to control flooding.

The glacier blocks a river in dam is known as________________

The name given to diversion channels of western Himalayas is__________________

Mattur dam is located across Krishna river.

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